#include<stdio.h>

int main()
{
	char cGrade;
	printf("please enter your grade:\n");
	scanf("%c",&cGrade);
	printf("Grade is about:");
	switch(cGrade)
	{
	
		case 'A':
			printf("90~100\n");
			break;
		case 'B':
			printf("80~89\n");
			break;
		case 'C':
			printf("70~79\n");
			break;
		case 'D':
		    printf("60~69\n");
			break;
		case 'F':
		    printf("<60\n");
		    break;
		default:
			printf("You enter the char is wrong\n");
			break;
	} 
	return 0;
 } 
